CN111976749A

CN111976749A - Driving device for locomotive bogie

Info

Publication number: CN111976749A
Application number: CN202010857777.5A
Authority: CN
Inventors: 邓小星; 沈龙江; 李冠军; 申长宏; 谢加辉; 谭桐; 彭波; 廖志伟; 朱向阳; 曾艳梅; 刘金菊; 李燕慧; 蔡超; 秦烺
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2020-11-24
Also published as: WO2022042067A1; EP4169796A1; BR112023002251A2

Abstract

The invention discloses a locomotive bogie driving device which comprises an axle, wherein a driven bull gear is arranged on the axle in an interference manner, the two sides of the axle are symmetrically provided with the same traction motors, rotating shafts of the traction motors are respectively provided with driving pinions in an interference manner, and the driving pinions of the traction motors on the two sides of the axle are simultaneously meshed with the driven bull gear to form a transmission gear pair. The driving torque and the driving power of the invention can be obviously increased and even doubled; and for a given single axle traction power and traction force, the single traction motor of the present invention will be smaller in size and weight, thereby providing a great spatial facility for the bogie drawbar to pass under the traction motor. In addition, the driving pinion and the driven gearwheel of the invention have better abrasion matching performance.

Description

Driving device for locomotive bogie

Technical Field

The invention relates to a railway locomotive bogie, in particular to a locomotive bogie driving device.

Background

At present, a single motor drives a single wheel pair of a driving device of a locomotive bogie, and except the driving device adopting the permanent magnet direct drive technology, other driving devices of the locomotive are matched with the traction characteristic of a traction system through gear pair speed change.

The current drive device technology for driving a single wheel pair by a single motor faces the following difficult challenges:

for high-speed locomotives, the greatest possible starting tractive effort is sought. The starting traction is given by the following equation: f = M × i/R

Wherein: f is starting traction force; m is the torque of the traction motor; i is a transmission ratio, namely the number of the driven gear teeth/the number of the driving gear teeth; and R is the radius of the wheel.

Generally, increasing the starting traction requires the use of as large a gear ratio as possible. Because the traction motor is limited by the bottom limit of the gear box (the maximum tooth number of the driven gear is limited when the gear module is given) and the minimum tooth number of the driving gear (generally not less than 17), the maximum transmission ratio of single-stage transmission is limited, so that only the torque of the traction motor can be increased, the torque of the traction motor needs to be increased by increasing the outer diameter of the traction motor, and the outer diameter of the traction motor cannot be increased all the time due to the limitation of the gear center distance between the driving gear and the driven gear (the gear center distance is the sum of the tooth numbers of the driving gear and the driven gear, multiplied by. Therefore, the torque of the traction motor of the traditional driving device exists in a ceiling and cannot be increased without limit.

(2) For high-speed locomotives, due to the limitation of the limit speed of the traction motor drive end bearing (the traction motor drive end bearing speed is the wheel pair speed multiplied by the transmission ratio), the high-speed locomotives often select a smaller transmission ratio. Therefore, the requirements of starting traction force of the traction motor of the high-speed locomotive on the transmission ratio and the requirements of increasing the running speed of the high-speed locomotive on the transmission ratio are completely opposite, and the requirements are a pair of spears. The driving device of the high-speed passenger locomotive is extremely difficult in technology if the driving device simultaneously meets the requirements of large starting traction force and high-speed running, and needs to adopt an innovative structural design.

Disclosure of Invention

The invention aims to solve the technical problem of providing a locomotive bogie driving device which can improve the maximum starting traction and is suitable for the high-speed running of a locomotive, aiming at the defects of the existing driving device for driving a single wheel pair by a single motor.

In order to solve the technical problem, the invention provides a locomotive bogie driving device which comprises an axle, wherein a driven large gear is arranged on the axle in an interference manner, the two sides of the axle are symmetrically provided with the same traction motors, driving pinions are respectively arranged on rotating shafts of the traction motors in an interference manner, and the driving pinions of the traction motors on the two sides of the axle are simultaneously meshed with the driven large gear to form a transmission gear pair.

The driving device adopts the design that the double traction motors and the double driving pinions simultaneously pull the driven large gear on the axle, so that when the driving device is adopted, the driving torque and the driving power of a single traction motor are obviously reduced or even halved, the volume and the weight of the single traction motor are smaller, and additionally, the reduction of the outer diameter size of the single traction motor provides huge space convenience for the traction rod of the bogie to pass through from the lower part of the traction motor. In addition, because the driving device is formed by matching the double driving pinions with the single driven gearwheel, compared with the traditional method that the single driving pinions are matched with the single driven gearwheel, the abrasion difference between the driven gearwheel and the driving pinions is smaller (when the traditional single driving pinions are matched with the single driven gearwheel, the abrasion rate of the driving pinions is far greater than that of the driven gearwheel), so that the abrasion matching performance of the driving pinions and the driven gearwheel is better. The important points are: due to the design of the double traction motors and the double driving pinions of the driving device, when the driving structure is adopted for appointed single-shaft traction power and traction force, the driving torque and the driving power of a single traction motor are remarkably reduced or even halved, so that the load of a transmission end bearing for supporting a rotating shaft of the traction motor is also reduced or even halved, and the transmission end bearing of the traction motor can select a bearing with a smaller specification (generally, the limited rotating speed of a small-specification bearing is higher) so as to improve the limited rotating speed of the transmission end bearing and the traction motor. The invention adopts the innovative design that the double traction motors drive the same wheel pair, so that the requirements of large starting traction force and high-speed operation of the locomotive are considered at the same time. The additional benefit is that the increase in the limit speed of the traction motor is beneficial to further take advantage of the high efficiency and low loss of the ac transmission.

Preferably, the driving pinion and the driven gearwheel are mounted in the same gearbox.

Preferably, the number of the traction motors is two, the number of the driven bull gears is one, the two traction motors are arranged on two sides of the axle in parallel at equal heights, and driving pinions on rotating shafts of the two traction motors are meshed with the driven bull gears at the same installation height, so that driving forces of the driving pinions on two sides of the driven bull gears are balanced, and the driven bull gears run stably and reliably.

Preferably, the traction motor shares one axle suspension box, and both sides of the traction motor are respectively installed on the axle by adopting an axle suspension bearing, so that the driving device has a very compact structure, the axle suspension structure and the driven large gear of the traditional driving device are fully utilized, the structural complexity is reduced to the maximum extent, and the application reliability of the driving device is improved.

Preferably, the drive pinion is cantilever-mounted on a rotating shaft of the traction motor.

Preferably, the traction motor frame is mounted in suspension on the frame of the bogie.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the driving apparatus of the present invention.

Fig. 2 is a top view of the driving device of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B in fig. 1.

In the figure:

101. a wheel; 102. an axle; 103. a traction motor; 104. a traction motor; 105. a gear case; 106. a driven bull gear; 107. a drive pinion; 108. a drive pinion; 109. a bearing is held; 110. axle suspension boxes; 111. a rotating shaft; 112. a rotating shaft; 113. a drive end bearing; 114. and a transmission end bearing.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

As shown in fig. 1 to 4, one embodiment of the driving device for a locomotive bogie of the present invention comprises a wheel pair (including a wheel 101 and an axle 102), a traction motor 103, a traction motor 104, a driven gearwheel 106, a driving pinion 107, a driving pinion 108 and a gear box 105. The traction motor 103 has a rotating shaft 111 and a drive end bearing 113, and the drive pinion 107 is cantilever mounted on the drive end of the rotating shaft 111. Traction motor 104 has a rotating shaft 112 and a drive end bearing 114, and drive pinion 108 is cantilevered on the drive end of rotating shaft 112. The driving pinion 107, the driving pinion 108 and the driven gearwheel 106 are mounted in the same gearbox 105.

Driven gear wheel 106 of interference fit on axletree 102, traction motor 103 and traction motor 104 symmetry are installed the both sides of axletree 102, interference fit driving pinion 107 in traction motor 103's pivot 111, interference fit driving pinion 108 in traction motor 104's pivot 112, and driving pinion 107, driving pinion 108 are located driven gear wheel 106's both sides respectively and form the driving gear pair with driven gear wheel 106 meshing simultaneously.

In order to increase the driving torque and the driving power of the invention obviously and even double, the specification models of the traction motor 103 and the traction motor 104 are the same, the traction motor 103 and the traction motor 104 are arranged on both sides of the axle 102 in parallel at the same height, and the driving pinion 107 and the driving pinion 108 are meshed with the driven gearwheel 106 at the same installation height.

The traction motor 103 and the traction motor 104 share a set of axle suspension box 110, and both sides of the axle suspension box are respectively installed on the axle 102 by adopting the axle suspension bearings 109, so that the driving device disclosed by the invention is very compact in structure, and the axle suspension structure and the driven large gear of the traditional driving device are fully utilized, the structural complexity is reduced to the greatest extent, and the application reliability of the driving device is improved.

In this embodiment, the driving device of the present invention adopts a spindle type structure, but the present invention is not limited to this, and the same principle of the present invention can be applied to a suspension type driving device, that is, the

traction motors

103 and 104 can also be suspension mounted on the frame of the bogie.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. The utility model provides a locomotive bogie drive arrangement, includes an axletree, the driven gear wheel of interference fit on the axletree, a serial communication port, the same traction motor is installed to the bilateral symmetry of axletree, interference fit initiative pinion respectively in traction motor's the pivot, just traction motor's of axletree both sides the initiative pinion simultaneously with driven gear wheel meshing forms the transmission gear pair.

2. A locomotive bogie drive arrangement according to claim 1, wherein said drive pinion and said driven bull gear are mounted in the same gearbox.

3. The driving device for a locomotive bogie according to claim 1, wherein the number of said traction motors is two, the number of said driven bull gear is one, and two of said traction motors are mounted in parallel at equal height on both sides of said axle, and the driving pinion on the rotating shaft of two of said traction motors is engaged with said driven bull gear at the same mounting height.

4. A locomotive bogie drive arrangement according to claim 1, wherein said traction motors share a set of axle boxes and are mounted on said axles on either side using respective axle suspension bearings.

5. A locomotive bogie drive arrangement according to claim 1, wherein said drive pinion is cantilever mounted on a rotating shaft of said traction motor.

6. A locomotive bogie drive arrangement according to claim 1, wherein said traction motor frame is mounted in suspension on the frame of said bogie.